Mount Prospect, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

032
FXUS63 KLOT 161930
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
230 PM CDT Mon Mar 16 2026

.KEY MESSAGES...

- Scattered snow showers and areas of blowing snow will continue
  through early this evening leading to localized poor
  visibility.

- Tonight will be unseasonably chilly with overnight wind
  chills ranging from 0 to locally 15 below.

- A clipper system will bring a period of snow to the area
  Tuesday night into Wednesday morning. Thereafter, a warming
  trend will commence through the end of the week.

&&

.DISCUSSION...
Issued at 230 PM CDT Mon Mar 16 2026

Snow showers continue this afternoon across much of the area,
but especially the eastern half of the cwa. Visibilities in
these snow showers have been reported to near zero at times and
opted to issue a winter weather advisory for this potential for
all but the Chicago metro area until 00z. Even outside these
snow showers, northwest winds gusting as high as 40 mph will
also produce areas of blowing and drifting snow. These northwest
winds will slowly diminish during the evening which will allow
the blowing snow threat to also slowly diminish through this
evening.

The snow showers are expected to slowly dissipate in intensity
and coverage by early this evening. However, many of the models
continue to show at least isolated snow showers through late
evening and possibly into the early overnight hours. Have
included slight chance pops for this potential. However, given
how strong these current snow showers are, if snow showers were
to continue tonight, they too would have the potential for brief
low visibility and perhaps some minor snow accumulations.

This potential for snow showers tonight may delay clearing
skies, but some clearing is expected by daybreak, especially
across the northwest cwa. This combined with the fresh snow pack
will allow temps to drop into the low single digits across the
northwest cwa, likely low teens for the rest of the area. Wind
speeds still in the 10 to 15 mph range will allow wind chills to
drop as low as 10 below zero early Tuesday morning.

A clipper system will move across the area Tuesday night
bringing a period of light accumulating snow to the area. There
remains some uncertainty for amounts and the overall trend from
the 12z guidance is for amounts to be a bit lower as the wave
weakens as it moves across the area. Still expecting snowfall
amounts of 1-2 inches but its also possible for some areas to
see under an inch. Looks to be a low qpf, high pop event. The
bulk of the snow should be over by daybreak Wednesday, but some
lingering snow is possible Wednesday morning, especially across
northwest IN. Temps are expected to be slowly warming into the
mid 20s by daybreak Wednesday, but with temps below freezing and
the snow falling at night, untreated surfaces are expected to
become snow covered and slippery.

Another weak wave moves southeast across the area late Wednesday
night into Thursday morning and may produce some light qpf,
especially over Lake Michigan and into northern IN and southwest
MI. Temps by this time look to be around or just above freezing.
Thus anything that does fall, looks to be mainly rain.
Confidence is also low with this potential and trends will need
to be monitored.

An overall warmer pattern is expected for the end of the week
and the weekend. Though there will be a cold front late Friday
afternoon into Friday night that could turn temps cooler,
especially near Lake Michigan. Then a second, stronger cold
front may move across the area Saturday night or early Sunday
morning, with temps returning to near normal or below normal
Sunday into Monday. cms

&&

.AVIATION /18Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 105 PM CDT Mon Mar 16 2026

Key aviation forecast messages:

- Snow with embedded heavier snow showers will end from west to
  east through the afternoon

- Gusty NW winds to 30-35 kt this afternoon will lead to blowing
  snow and associated reduced VSBY, especially at RFD/DPA

- Additional snow showers may redevelop into this evening

The back edge of the band of snow is approaching the I-39
corridor early this afternoon. A trailing thin layer of stratus
may still produce flurries through this evening with the
primary driver of reduced visibility at RFD being blowing snow.

Farther to the east, embedded heavier snow showers are still
ongoing over the Chicago metro area. This may lead to dips in
visibility as low as 1 to 2 miles through mid afternoon. Areas
south of I-80 could have VSBY reductions below 1/2 mile at
times. There remains a signal for northwest to southeast
oriented narrow bands of snow redeveloping into this evening
which could result in brief periods of reduced visibility if
one were to move directly overhead. Have TEMPO groups accounting
for this for the Chicago area terminals with a PROB30 for RFD.

Ceilings will remain mainly MVFR through this evening, though
brief periods of VFR will be possible given how thin the
trailing stratus layer is. Expect the MVFR stratus to
eventually scatter out overnight. Increasing high clouds are
expected Tuesday afternoon ahead of our next weather system.

Winds will remain strong out of the west northwest through
sunset with gusts in the 30-35 kt range, with sporadically
higher gusts up to near 40 kt possible early this afternoon.
Gusts ease into this evening and overnight with winds turning
west and then southwest through the day on Tuesday.

Petr

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...Winter Weather Advisory until 7 PM CDT this evening for ILZ003-
     ILZ004-ILZ005-ILZ008-ILZ010-ILZ011-ILZ012-ILZ019-ILZ020-
     ILZ021-ILZ023-ILZ032-ILZ033-ILZ039-ILZ105-ILZ106-ILZ107-
     ILZ108.

IN...Winter Weather Advisory until 7 PM CDT /8 PM EDT/ this evening
     for INZ001-INZ002-INZ010-INZ011-INZ019.

LM...Gale Warning until 10 PM CDT this evening for the IL and IN
     nearshore waters.

&&

$$

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